Hillary Clinton (former first lady of the United States, U.S. senator, presidential candidate, secretary of state designate)

@hillaryclinton or someone on her staff tweeted tersely but prolifically about her campaign schedule, but her interest in Twitter petered out–understandably–once it was clear the presidential nomination would not be hers. She isn’t following a single soul, which may be a sign that she never really understood Twitter in the first place.